Transfer a stolen design for spout (7)
I believe the answer is:
declaim
'spout' is the definition.
(I know that spout can be written as declaim)
'transfer a stolen design' is the wordplay.
'transfer' becomes 'decal' (design transferred onto a surface).
'stolen' indicates named letters should be taken away (some letters are taken away).
'design' becomes 'aim' (I've seen this in another clue).
'decal' with 'a' taken out is 'decl'.
'decl'+'aim'='DECLAIM'
'for' acts as a link.
(Other definitions for declaim that I've seen before include "How orator will" , "Speak imposingly" , "Speak boldly" , "Rail against" , "Harangue" .)